Hello @Ballela Siva Te ,

Here's how your UI Action form should look:

• Name: Extend Review Date
• Table: Knowledge (kb_knowledge)
• Action name: extend_review_date
• Show insert: Unchecked
• Show update: Checked
• Show on form: Checked
• Condition:

var reviewDate=current.review_date,today=new GlideDateTime,fifteenDaysFromNow=new GlideDateTime;fifteenDaysFromNow.addDaysLocalTime(15);

• Script:

    var reviewDate = new GlideDateTime(current.review_date);
    reviewDate.addMonthsLocalTime(6);
    current.review_date = reviewDate;
    current.update();
    gs.addInfoMessage('The review date has been extended by six months.');
    action.setRedirectURL(current);

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Thanks,

Amitoj Wadhera